As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO DURING BOTH ENGINES START, THE LT ENGINE IN IDLE REACHED 5.0 UNITS VIBRATION; SO MAINTENANCE PERSONNEL PERFORMED BOROSCOPIC INSPECTION NO FOUND DAMAGES; IT WAS PERFORMED THE FIM 36-10 TASK 801 DETECTING A WIRING HARNESS DAMAGED; SO THE MW0311 WIRING HARNESS LT ENGINE WAS REPLACED IAW AMM 71-51-03, ALL CORRECT.